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      01-11-2012, 01:38 PM   #4
Syndicategt
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Drives: 335i
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Like the others mentioned, most likely turbo bearing seals are leaking oil in your turbos, causing the blueish smoke. Cats cover up the smoke, so it will become more pronounced when going catless. Have them inspected, most likely you will need them replaced. If out of warranty, give Rob Beck a PM
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